include ../../py/mkenv.mk

CROSS = 0

# qstr definitions (must come before including py.mk)
QSTR_DEFS = qstrdefsport.h

# MicroPython feature configurations
MICROPY_ROM_TEXT_COMPRESSION ?= 1

# include py core make definitions
include $(TOP)/py/py.mk

ifeq ($(CROSS), 1)
CROSS_COMPILE ?= arm-none-eabi-
endif

INC += -I.
INC += -I$(TOP)
INC += -I$(BUILD)

ifeq ($(CROSS), 1)
DFU = $(TOP)/tools/dfu.py
PYDFU = $(TOP)/tools/pydfu.py
CFLAGS_CORTEX_M4 = -mthumb -mtune=cortex-m4 -mcpu=cortex-m4 -msoft-float -fsingle-precision-constant -Wdouble-promotion -Wfloat-conversion
CFLAGS = $(INC) -Wall -Werror -std=c99 -nostdlib $(CFLAGS_CORTEX_M4) $(COPT)
LDFLAGS = -nostdlib -T stm32f405.ld -Map=$@.map --cref --gc-sections
else
LD = gcc
CFLAGS = -m32 $(INC) -Wall -Werror -Wdouble-promotion -Wfloat-conversion -std=c99 $(COPT)
LDFLAGS = -m32 -Wl,-Map=$@.map,--cref -Wl,--gc-sections
endif

CSUPEROPT = -Os # save some code space

# Tune for Debugging or Optimization
ifeq ($(DEBUG), 1)
CFLAGS += -O0 -ggdb
else
CFLAGS += -Os -DNDEBUG
# Don't bring in *_chk symbols from Glibc, see unix/Makefile for more details
CFLAGS += -U _FORTIFY_SOURCE
CFLAGS += -fdata-sections -ffunction-sections
CFLAGS += -fno-stack-protector
CFLAGS += -fno-unwind-tables -fno-asynchronous-unwind-tables
CFLAGS += -fno-pie
ifneq ($(CROSS), 1)
CFLAGS += -mpreferred-stack-boundary=2
# Nowadays various compilers have PIE by default, which bloats executable
# size.
LDFLAGS += -no-pie
# Nowadays various compilers have -z relro as default, which cause random
# blo(a)ts of zeros inside executable files, see
# https://stackoverflow.com/questions/48372235/unexplained-padding-to-elf-section
LDFLAGS += -Wl,-z,norelro
# And of course, we don't need no build ids.
LDFLAGS += -Wl,--build-id=none
endif
LDFLAGS += -s
endif

LIBS =

SRC_C = \
	main.c \
	uart_core.c \
	lib/utils/printf.c \
	lib/utils/stdout_helpers.c \
	lib/utils/pyexec.c \
	lib/mp-readline/readline.c \
	$(BUILD)/_frozen_mpy.c \

ifeq ($(CROSS), 1)
SRC_C += lib/libc/string0.c
endif

OBJ = $(PY_CORE_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))

ifeq ($(CROSS), 1)
all: $(BUILD)/firmware.dfu
else
all: $(BUILD)/firmware.elf
endif

frozentest.mpy: frozentest.py
	$(MPY_CROSS) $^ -o $@

$(BUILD)/_frozen_mpy.c: frozentest.mpy $(BUILD)/genhdr/qstrdefs.generated.h
	$(ECHO) "MISC freezing bytecode"
	$(Q)$(TOP)/tools/mpy-tool.py -f -q $(BUILD)/genhdr/qstrdefs.preprocessed.h -mlongint-impl=none $< > $@

$(BUILD)/firmware.elf: $(OBJ)
	$(ECHO) "LINK $@"
	$(Q)$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
	$(Q)$(SIZE) $@

$(BUILD)/firmware.bin: $(BUILD)/firmware.elf
	$(Q)$(OBJCOPY) -O binary -j .isr_vector -j .text -j .data $^ $(BUILD)/firmware.bin

$(BUILD)/firmware.dfu: $(BUILD)/firmware.bin
	$(ECHO) "Create $@"
	$(Q)$(PYTHON) $(DFU) -b 0x08000000:$(BUILD)/firmware.bin $@

deploy: $(BUILD)/firmware.dfu
	$(ECHO) "Writing $< to the board"
	$(Q)$(PYTHON) $(PYDFU) -u $<

# Run emulation build on a POSIX system with suitable terminal settings
run:
	stty raw opost -echo
	build/firmware.elf
	@echo Resetting terminal...
# This sleep is useful to spot segfaults
	sleep 1
	reset

test: $(BUILD)/firmware.elf
	$(Q)/bin/echo -e "print('hello world!', list(x+1 for x in range(10)), end='eol\\\\n')\\r\\n\\x04" | $(BUILD)/firmware.elf | tail -n2 | grep "^hello world! \\[1, 2, 3, 4, 5, 6, 7, 8, 9, 10\\]eol"

include $(TOP)/py/mkrules.mk
